Welcome, Lifehackers, to the next Hacker Challenge! Each week, we issue a new challenge. You get…
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Check out the description of Matthew's winning entry below and read about some of our other favorites.

Winner: Create a Dock With Just Your Box

Matthew Dias made a dock (see lead image) using just his phone's box. He slit the back for the cable (using the instruction pack for extra padding under the connector) and one in the middle of the packaging tray small enough for the connector to stay firmly wedged. We loved that Matthew used only pieces that any smartphone buyer already has at hand.

Honorable Mentions

We got a lot of great entries and we'd be remiss if we didn't share some of our favorites. Here are some of the entries that really impressed us.

Mount Your Phone in Your Car Using Magnets

Reader LMahesh used magnets to mount his phone to his dash. There are no buttons to press and no clamps to squeeze. All functions work as expected—compass, GPS, reception, and WiFi. Since his iPhone did not have sufficient metal in the rear panel, LMahesh used a custom replacement rear panel with metal elements. You could also use a case with metal elements.

Build a Car Mount With LEGOS

Reader Paul Rea was frustrated with clunky, oversized universal car mounts, so he built one just for his phone—using LEGO Technic pieces and zip ties. His construction holds the mount securely in an empty slot under his stereo, providing a ready place to slide his phone. You can check out more details of his build in the PDF he provided.

Knit a Cozy For Your Smartphone

Reader Jacquie Howard knitted a great-looking cozy for her iPhone. When you look at it straight on, it appears to feature just red and black stripes. But when you hold it at an angle, a cleverly-hidden Apple Logo is revealed. She also left a small window so she could swipe to answer a call without removing the phone from the cozy.

A big thanks to everyone who took the time to send us entries! Be sure to check back every week for a new challenge.